Which institute has developed a pest-resistant variety of cotton against whiteflies?

In the following question, out of the four alternatives, choose the word which is opposite in meaning to the given word.
INTANGIBLE

निम्न में अशुद्ध शब्द है ।    

Which nation's leader called 'Coronavirus' its biggest challenge since World War II?

निम्न में शब्द शुद्ध है । 

The book titled as "Invincible - A Tribute to Manohar Parrikar", is authored by whom?

The Indian Institute of Technology, Kanpur and Which of the following companies have collaborated to carry out joint research in industrial and infrastructure cybersecurity?

The Ordnance Factory Day is observed on which of the following dates?