The length of clear zone for none instrument runway of a small aircraft is A. 150 m B. 300 m C. 600 m D. 750 m

Option A is incorrect because the required clear zone length for a small aircraft is 300 m, not 150 m.

Option C is incorrect because the required clear zone length for a small aircraft is 300 m, not 600 m.

Option D is incorrect because the required clear zone length for a small aircraft is 300 m, not 750 m.