| Which of these phenomenon are caused due to refraction of light? |
| 1. Twinkling of stars |
| 2. Straw appears bent when put obliquely in water |
| 3. Formation of shadow |
| 4. Sun appears bigger during sun set or sunrise |
| Select the answer from the following codes: |
A) Only 1
B) 1, 3 and 4
C) 1, 2 and 4
D) Only 3
E) 2 and 4
Correct Answer: C
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