Step 1: Understanding the Concept.
Reptiles were the first vertebrates to fully break free of water for reproduction, and their egg design is what made that possible. The question is testing three separate technical labels used for that egg design at once.
Step 2: Key Formula or Approach.
Break the reptilian egg down feature by feature: how much yolk it holds, whether it needs an external water body, and whether it carries protective membranes. Each feature maps to one technical term, and all three terms must be checked together against the options.
Step 3: Detailed Explanation.
Yolk content: reptilian eggs are packed with a large, dense yolk mass to feed the embryo through its entire development on land, so they are called megalecithal (macrolecithal), never microlecithal, centrolecithal, or alecithal, which describe far smaller or differently arranged yolk amounts seen in other animal groups.
Water independence: the egg is enclosed in a tough shell that seals in its own internal fluid supply, so the embryo never needs an external pond or stream to develop in, this sealed, self-sufficient design is called cleidoic (from the Greek for "key" or "locked").
Membranes: inside that shell, the embryo is wrapped in the amnion (a fluid-filled sac), the chorion, and the allantois, and having these extra-embryonic membranes is what defines an egg as amniotic.
Put the three findings together: large yolk (megalecithal), sealed self-contained shell (cleidoic), and amnion-chorion-allantois present (amniotic).
Step 4: Final Answer.
A reptilian egg is correctly described as cleidoic, amniotic and megalecithal, option (1).