Step 1: Analyzing Scarecrow.
"Scarecrow" is an exocentric compound because it doesn't directly reflect the meaning of its individual components. A scarecrow is not a type of crow; it is an object used to scare crows. Hence, P corresponds to error type (iii) Exocentric.
Step 2: Analyzing Shoerack.
"Shoerack" is an endocentric compound because it represents a type of rack used to store shoes. It is a specific object and the compound directly describes its function. Hence, Q corresponds to error type (iv) Endocentric.
Step 3: Analyzing Sleepwalk.
"Sleepwalk" is a copulative compound because both parts contribute equally to the meaning. It refers to the act of walking while asleep. Hence, R corresponds to error type (i) Copulative.
Step 4: Analyzing Maidservant.
"Maidservant" is an appositional compound because it combines two nouns that define the same entity. A maidservant is a servant who is a maid. Hence, S corresponds to error type (ii) Appositional.
Thus, the correct matching is:
P – iii, Q – iv, R – i, S – ii.