Which of the following words can be formed using the letters of the word only once? BIODIVERSITY Word I: DEORBITS Word II: STEROID Word III: VISITER
All the words can be formed using the letters only once.
In this word-formation question we check whether each target word can be built using the letters of BIODIVERSITY, never using any single letter more times than it appears there.
List the available letters of BIODIVERSITY: B, I, O, D, I, V, E, R, S, I, T, Y — note that the letter I appears three times, and every other letter once.
Word I, DEORBITS, needs D, E, O, R, B, I, T, S; each is available and I is used only once, so it can be formed.
Word II, STEROID, needs S, T, E, R, O, I, D; each is available and again I is used once, so it can be formed.
Word III, VISITER, needs V, I, S, I, T, E, R; it uses the letter I twice, and since three I's are available that demand is met, so it too can be formed.
Because none of the three words exceeds the supply of any letter, all of them qualify.
The key idea is to check letter availability against the repeated stock, especially the three I's.
Hence All the words can be formed using the letters only once.
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