Step 1: Understanding the phonological rule.
The rule states that a nasal sound will take on the place of articulation of the following consonant. Specifically, the nasal sound will assimilate to the place of the following consonant.
Step 2: Analyzing the options.
(A) [sampark]:
The nasal [m] is followed by [p], a bilabial consonant. The nasal [m] is a bilabial nasal, which correctly assimilates to [p], so this follows the rule.
(B) [lantap]:
The nasal [n] is followed by [t], a dental consonant. The nasal [n] will assimilate to the place of [t] and become a dental nasal [n̪], which fits the rule.
(C) [pinjkata]:
The nasal [n] is followed by [j], a palatal consonant. According to the rule, the nasal should assimilate to the palatal place of articulation, making it a palatal nasal, which is consistent with the rule.
(D) [danpo]:
The nasal [n] is followed by [p], a bilabial consonant. The nasal [n] should assimilate to [p] and become a bilabial nasal [m], but the output is [danpo], which retains the dental nasal [n]. This does not follow the rule, making this the incorrect option.