Which of these was the third nation created in 1971 on the indian subcontinent?

The third nation created on the Indian subcontinent is Bangladesh.
Bangladesh managed to get its independence in 1971, and formed a provisional government in April the same year in Mujibnagar. The government was in exile afterwards in Calcutta. The independence came after a war with Western Pakistan, and a a genocide over the population in Bangladesh.

Im pretty sure the answer is d.) is more densely populated.