Select the related word pair from the given alternatives.
Holi : Colours :: ........ : .........

Holi is celebrated as Festival of Colours. Similarly Diwali is celebrated as Festival of Lights. Hence Option A is correct Option.

All Other options other than A does not follow.

1) We will eliminate Option B. Muharram : Muslim - Muharam is celebrated by Islamic but purpose of muhram is not explained.

2) We will eliminate Option C. Hemis : Folk - Here Hemis is celebrated main Buddhist but main theme is not explained.

3) We will eliminate Option D Lodhi : Punjabi - Here also logic is Festival main theme for what festival is celebrated it is not explained.