Understanding Dictionary Order

Dictionary order, also known as alphabetical order, is the way words are arranged in a dictionary. It is based on comparing words letter by letter from the beginning. If the first letters are the same, we compare the second letters, and so on, until we find a difference. The word with the letter that comes earlier in the alphabet will be placed earlier.

Arranging the Words Alphabetically

The words we need to arrange in dictionary order are:

• 1. Cardiodynias
• 2. Cardiospasms
• 3. Carburetting
• 4. Carburettors
• 5. Carcinogenic

Let's compare these words letter by letter to determine their order. All words begin with "Car". So, we look at the fourth letter:

• Carburetting (3)
• Carburettors (4)
• Carcinogenic (5)
• Cardiodynias (1)
• Cardiospasms (2)

Comparing the fourth letters ('b', 'c', 'd'), in standard dictionary order, 'c' comes before 'b', and 'b' comes before 'd'. This would suggest the order should start with words having 'c' as the fourth letter, then 'b', then 'd'. However, based on the sequence provided in the correct option (34512), the words beginning with 'Carb' appear first, followed by 'Carc', then 'Cardio'. Let's arrange the words based on this sequence and verify the internal order.

Comparing Words Starting with "Carb"

We compare Carburetting (3) and Carburettors (4):

Carburetting (3)

Carburettors (4)

Comparing the ninth letter, 'i' comes before 'o' in the alphabet. Therefore, Carburetting (3) comes before Carburettors (4). This matches the beginning of the sequence 34512.

Comparing Words Starting with "Cardio"

We compare Cardiodynias (1) and Cardiospasms (2):

Cardiodynias (1)

Cardiospasms (2)

Comparing the seventh letter, 'd' comes before 's' in the alphabet. Therefore, Cardiodynias (1) comes before Cardiospasms (2). This matches the end of the sequence 34512.

Determining the Overall Order

Following the sequence 34512, the words are ordered as Carburetting (3), Carburettors (4), Carcinogenic (5), Cardiodynias (1), and Cardiospasms (2).

Let's confirm the relative positions based on letter comparison as implied by this order:

• Carburetting (3) comes before Carburettors (4) because 'i' < 'o'.
• Carburettors (4) comes before Carcinogenic (5). Comparing "Carburetto..." and "Carcinogen...", this implies words starting 'Carb' are placed before 'Carc' in this sequence.
• Carcinogenic (5) comes before Cardiodynias (1). Comparing "Carcinogen..." and "Cardiodynia...", this implies words starting 'Carc' are placed before 'Cardio' in this sequence.
• Cardiodynias (1) comes before Cardiospasms (2) because 'd' < 's'.

Arranging the words according to the sequence 34512 gives:

1. Carburetting (3)
2. Carburettors (4)
3. Carcinogenic (5)
4. Cardiodynias (1)
5. Cardiospasms (2)

Final Arranged Sequence

The words arranged in the specified order are Carburetting, Carburettors, Carcinogenic, Cardiodynias, and Cardiospasms. The corresponding sequence of their original numbers is 3, 4, 5, 1, 2.