To answer this question, we need to understand the context of the given names.

Option A) Saree Types - This option is incorrect because Gyaneshwari, Lichchavi, Gorakhdham, and Sarayu are not names of saree types. They are not related to clothing in any way.

Option B) Rivers - This option is incorrect because Gyaneshwari, Lichchavi, Gorakhdham, and Sarayu are not names of rivers. They do not represent any known rivers.

Option C) Express Trains - This option is correct because Gyaneshwari, Lichchavi, Gorakhdham, and Sarayu are all names of express trains. These train names are commonly used in India.

Option D) Buddhist Monasteries - This option is incorrect because Gyaneshwari, Lichchavi, Gorakhdham, and Sarayu are not names of Buddhist monasteries. They do not represent any known monasteries.

The correct answer is C) Express Trains. This option is correct because Gyaneshwari, Lichchavi, Gorakhdham, and Sarayu are all names of express trains.

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To solve this problem, we can use the concept of work rates. Let's assume Krish's work rate is 1 unit per day. Since Ram is half as efficient as Krish, his work rate would be 0.5 units per day.

Now, let's calculate how long it would take for Ram to complete the work alone. We can set up the equation:

Ram's work rate * Time taken = 1 (complete work)

0.5 * Time taken = 1

Time taken = 1 / 0.5

Time taken = 2 days

Therefore, it would take Ram 2 days to complete the work alone.

Now, let's calculate how long it would take for Ram and Krish to complete the work together. To find the combined work rate, we can add their individual work rates:

Combined work rate = Ram's work rate + Krish's work rate

Combined work rate = 0.5 + 1

Combined work rate = 1.5 units per day

Now, let's set up the equation for the combined work rate:

Combined work rate * Time taken = 1 (complete work)

1.5 * Time taken = 1

Time taken = 1 / 1.5

Time taken ≈ 0.67 days

Since the time taken cannot be a fraction of a day, we round it up to the nearest whole number, which is 1 day.

Therefore, Ram and Krish will take 1 day to complete the work together.

The correct answer is D) 8.

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• Wrong explanation