In the following question, the sentence given with blank to be filled in with an appropriate word. Select the correct alternative out of the four and indicate it by selecting the appropriate option.
The ASEAN India Film Festival 2018 was held in New Delhi. It was inaugurated by Information and Broadcasting Minister Col. (Retd) Rajyavardhan Singh Rathore.
The angle of elevation of the top of a pillar from the foot and the top of a building 20 m high, are 60° and 30° respectively. The height of the pillar is