Under what circumstance do we say two or more nodes are daughters of another node in P-marker?​

Explanation:

The term node in this context basically refers to a series or groups of points in a graph,  phrase markers, or a tree.

It is noteworthy that two or more nodes are referred to as daughters of another node in P-marker when if and only if the nodes in consideration (eg T, Q, R) are immediately dominated by another (M), which is called the mother node.

part a.   = c.)

part b. = a.)

explanation: