S1: We now know that the oceans are very deep.
P : For example, the Indian ocean has a range called the Indian Ridge.
Q : Much of it is fairly flat.
R : However, there are great mountain ranges as well.
S : On average the bottom is 2.5 miles to 3.5 miles down.
S6: This reaches from the India to the Antarctic.
The Proper sequence should be:
A. SQPR
B. PQSR
C. RSQP
D. QPRS
Answer: Option A
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