Questions

Sad means being unhappy, sorrowful, mournful, wistful,...

Hence, Somber means cheerless i.e, unhappy which is synonym of sad. All other options are opposites of Sad.

Silvassa is in Dadra and Nagar Haveli.Kavarati is capital of Lakshadweep. Itanagar is capital of Arunachal PradeshThese three were originally included in smart city list.Assam government has sent a proposal for Jorhat to be included in smart city list. But it has not yet been included.

Electrostatic precipitator is used to control Air pollution. An electrostatic precipitator is a filtration device that removes fine particles, like dust and smoke, from a flowing gas using the force of an induced electrostatic charge minimally impeding the flow of gases through the unit.

Kernel follows Round Robin scheme choosing a swap device among the multiple swap devices in Unix System V.