Correct Answer:
A. دیکھ
This is a common Urdu idiom. The complete proverb is "بنیے کا بیٹا کچھ دیکھ کر ہی گرتا ہے," meaning a cautious person acts only after careful observation. Other options like 'کھیل', 'سیکھ', and 'پڑھ' do not form the correct idiomatic expression.