Question:

A student studies for long hours but without proper planning. This may result in

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Effective study habits include:
• Proper planning.
• Short study sessions with breaks.
• Regular revision.
• Adequate sleep and relaxation. These improve learning and reduce mental fatigue.
Updated On: Jul 15, 2026
  • Better retention.
  • Faster learning.
  • Decreased efficiency and mental fatigue.
  • Perfect understanding of all topics.
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The Correct Option is C

Solution and Explanation

Concept: Effective learning depends on proper planning, regular breaks and good study strategies. Studying continuously for long hours without planning often causes fatigue and reduces learning efficiency.

Step 1:
Understand the situation.
Lack of planning leads to poor concentration, stress and reduced productivity.

Step 2:
Analyse the options.

• Better retention -- Not guaranteed.
• Faster learning -- Unlikely.
• Decreased efficiency and mental fatigue -- Correct. \checkmark
• Perfect understanding of all topics -- Unrealistic.

Step 3:
Final conclusion.
Therefore, studying for long hours without proper planning may result in \[ \boxed{\text{Decreased efficiency and mental fatigue}.} \]
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