XAT 2015 — VARC Question 2

“Infantile” means 'displaying or suggesting a lack of maturity'.
“Charlatan” means 'person who pretends to special knowledge or skill that he or she does not possess'.
“Imbecile” means 'a very foolish or stupid person'.
“Awful” means 'very bad or unpleasant'.
All the four words indicate a sense of disapproval or express a negative opinion.
So we can eliminate options 1, 2, 3 and 5.
“Childlike” means 'having the good qualities, such as innocence, associated with a child'. Having good qualities indicates a sense of approval and expresses a positive opinion.
Hence, the correct answer is option 4.