Which of the following was a land dinosaur?

The epoch of human civilization is

Match the organism with its appropriate origin time:

List-$I$	List-$II$
$(a)$ Jawless fish	$(1)$ $200$ million years
$(b)$ Sea weeds and plants	$(2)$ $500$ million years ago
$(c)$ Invertebrates	$(3)$ $350$ million years ago
$(d)$ Fish-like reptiles	$(4)$ $320$ million years ago

The mammals evolved from the reptiles in the:

Identify the organism based on the following characteristics:
- They were land reptiles.
- They had huge, fearsome, dagger-like teeth.

Which era is known as the 'Age of Reptiles'?