Question 1
What gametes can a Tt pea plant produce?
The right answer is the one marked above.
Gametes carrying T and gametes carrying t, in equal numbers. Meiosis puts one chromosome of each homologous pair into each gamete, so each gamete gets one factor of the pair — never both.
Writing Tt as a gamete is the commonest mistake in this topic. A gamete is half a pair, not a pair.