i. is a phenomenon of refraction of light.
ii. occurs when light rays travel into a denser medium.
iii. occurs when the critical angle is just exceeded.
iv. is a phenomenon of reflection of light.
A. i and ii only
B. i and iii only
C. i, ii and iii only
D. i, iii and iv only
Correct Answer: Option B
B. i and iii only
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