Questions

As a wholesaler, applicant should say that he/she would face production problem, growing consumption, not concentrating on important market segment, scale of operations not being proper, delivery to different stores and having some issues with suppliers and not a good relationship with suppliers. I would face these problems in reaching the target commitment to suppliers as a wholesaler.

Tetrad is a homologous chromosome pair in the given options. A homologous chromosome pair is a pair of chromosomes one from father and one from mother that has same gene sequence after the process of meiosis.

Covalent bonding occurs when pairs of electrons are shared by atoms. Atoms will covalently bond with other atoms in order to gain more stability, which is gained by forming a full electron shell. By sharing their outer most (valence) electrons, atoms can fill up their outer electron shell and gain stability.

Examples of compounds with covalent bonds ::

HCl, CO2, O2,... 

Photosynthesis is the process that converts solar energy into chemical energy. During the stage of light-dependent reactions involving photosystems I and II in photosynthesis, O2 produced.

The boy fell off the bicycle.

All the words in the sentence are correct and require no changes. Hence, the correct answer is option 5.