The correct answer is: b) Small game, fish, and wild plants.
Mesolithic hunter-gatherers in Punjab likely subsisted on small game, fish, and wild plants. This is because the region is not well-suited for agriculture, and there is evidence that Mesolithic people in the region hunted animals such as deer, wild boar, and rabbits. They also gathered wild plants, such as fruits, nuts, and berries.
Option a) is incorrect because large game animals are not as common in the Punjab region as small game animals.
Option c) is incorrect because there is no evidence that Mesolithic people in the Punjab region cultivated crops.
Option d) is incorrect because there is no evidence that Mesolithic people in the Punjab region herded livestock.