The book 'Silent Spring' published in 1962 which set the tone for an environmental movement in the world, was written by

1. A

   Carolyn Merchant

   (a) Carolyn Merchant. Merchant wrote The Death of Nature (1980) on scientific revolution and ecofeminism—not Silent Spring in 1962.

2. B

   Karl Marx

   (b) Karl Marx. Marx’s nineteenth-century political economy is not the 1962 pesticide book.

3. C

   Rachel Carson

   (c) Rachel Carson. Silent Spring (1962) documented DDT and pesticide harm to birds and ecosystems and is credited with launching the modern environmental movement. Official key.

4. D

   Rajgopalan

   (d) Rajgopalan. An Indian environmental-studies textbook name, not the 1962 American author.

Summary. Official key is (c) Rachel Carson. Silent Spring appeared in 1962 in the United States and forced a rethink of chemical pesticides, feeding the EPA-era environment movement. Merchant, Marx and Rajgopalan did not write that book. The keyed author is Carson.