The floor of the cranium includes all the following bones excepta the temporal bonesb the occipital bonec the ethmoid boned the sphenoid bone

The best answer according to the option is - C the temporal bone.

Explanation:

Human skull have 22 bones which are divided in two part facial bones and the cranial bones. Cranial bones are divided into different parts, Cranial floor or the base of skull is the inferior area of the skull.

The floor of the cranial is made up of the the ethmoid bone, the sphenoid bone and the occipital bone. The temporal bone is one of the facial bone that also present on the base of the skull.

Thus, the correct answer is option - C the temporal bone.

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products