Pay lip service

Answer: Option A

Explanation:

Example : She has kept her house spick and span.

Answer: Option A

Explanation:

Perplexed means cause to feel completely baffled.
Example: Rahul was at his wit's end to find that his sister has failed.

Answer: Option A

Explanation:

Example: Real friends never leave us alone in close quarters.

Answer: Option B

Explanation:

Example : He refused to co-operate with me, so threw a spanner on my plan.

Answer: Option B

Explanation:

Example : I think this demand is just a red herring, please check other one.