A) If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B) If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C) If the assertion is true but the reason is false
D) If both the assertion and reason are false
E) If the assertion is false but reason is true
Correct Answer: A
Solution :
In Spirogyra, the outermost portion of pectose changes into pectin. The latter dissolves in water to form the so-called gelatinous sheath which is slimy. It envelopes the entire filament. This makes filament slippery in touch.
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