The correct answer is option 1 - Apple.

A true fruit is defined as the mature ovary of a flowering plant that develops after pollination. It contains seeds and is formed from the fertilization of the ovules.

Option 2 - Date is a true fruit. It is formed from the ovary of the date palm tree and contains seeds.

Option 3 - Coconut is also a true fruit. It develops from the ovary of the coconut palm tree and contains seeds.

Option 4 - Tomato is technically a true fruit as well. It is formed from the ovary of the tomato plant and contains seeds.

However, option 1 - Apple, is not a true fruit. It is actually a false fruit or an accessory fruit. The part that we consider as the "fruit" of an apple is actually the enlarged receptacle or the base of the flower. The actual seeds of an apple are found within the core.