Select the correct option:
The memorandum clarified that employees must comply _______ the revised code of ethics.

Correct option is B

The correct option to fill in the blank is (b) with.
Explanation: The verb comply is followed by the preposition with when referring to rules, laws, or instructions. Hence, “comply with the revised code of ethics” is grammatically correct. (Hindi meaning of comply: पालन करना)
Example: All staff must comply with company policies.
Why other options are incorrect (with meanings):
· (a) to: used for direction/recipient (को/की ओर) — wrong collocation with comply.
· (c) by: indicates method/agent/time limit (के द्वारा/तक) — not used after comply.
· (d) in: indicates location/field (में) — does not match “comply ___ rules.”