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Kepler’s second law (equal areas in equal times) implies varying speed (faster at perihelion, slower at aphelion) due to angular momentum conservation. Option 2 is incorrect as speed is not constant.
Ref: NCERT Class 11 Physics, Thermal Properties and Gravitation.
(L = mrv), which remains constant for a central force like gravity, ensuring ΔA/Δt = L/(2m) is constant. As per NCERT, applying relevant law/formula with correct units and sign convention leads to Conservation of angular momentum. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.
Ref: Halliday & Resnick, Fundamentals of Physics, 11th ed., Chapter 13: Gravitation.
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