Questions

India’s biggest water carnival through ‘Jal Mahotsav’ is organized every year in Hanuwantiya Island in Madhya Pradesh. The festival is a celebration of the natural beauty and the culture od Madhya Pradesh.

Leather is a durable and flexible material created by tanning animal rawhide and skins. The major ingredient of leather is Collagen.

Vishakha and others v State of Rajasthan was a 1997 Indian Supreme Court case where Vishakhaand other women groups filed Public Interest Litigation (PIL) against State of Rajasthan and Union of India to enforce the fundamental rights of working women under Articles 14, 19 and 21 of the Constitution of India.The court decided that the consideration of "International Conventions and norms are significant for the purpose of interpretation of the guarantee of gender equality, right to work with human dignity in Articles 14, 15, 19(1)(g) and 21 of the Constitution and the safeguards against sexual harassment implicit therein.

The given sentence is in simple present tense and states a general fact, hence the latter half of the sentence with the blank will also be in the simple present tense. Since the subject in the latter part of the sentence is singular .i.e. 'the number', the verb will be followed accordingly. Hence, option 4 is the correct answer.