The given sentence is divided into four segments. Select the option that has the segment with a grammatical error.
The sun rises / in an east / and sets / in the west.

Correct option is A

Explanation:
• “In an east” is incorrect.
• "East" is a proper noun in this context and should be preceded by "the".
Correct: The sun rises in the east and sets in the west.
Grammar Rule (Articles with Directions):
• Use “the” with cardinal directions (the east, the west).
• Example: He looked toward the north.