(a) Weight for height $-$ 3 SD
(b) Weight for height $-$ 2 SD
(c) MUAC less than 115 mm
(d) MUAC less than 125 mm
Diagnosing Severe Acute Malnutrition (SAM) in children $\le$ 5 years involves specific anthropometric measures.
The primary criteria for identifying SAM are:
Option (a) represents the weight-for-height criterion, and option (c) represents the MUAC criterion for SAM.
Based on standard diagnostic guidelines:
Therefore, the correct diagnostic criteria for SAM in children $\le$ 5 years, as presented in the options, are (a) and (c).