As per ICAO, for A, B, and C type of airports, maximum effective, transverse and longitudinal grades in percentage respectively are______________?

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As per ICAO, for A, B, and C type of airports, maximum effective, transverse and longitudinal grades in percentage respectively are______________?

A. 1.0, 1.5 and 1.5
B. 1.0, 1.5 and 2.0
C. 1.5, 1.5 and 2.0
D. 2.0, 2.0 and 2.0