"मेरे हाथ में दर्द है ।"

[RbenBoas1]

The correct answer is a literal translation. However answers such as "My hand hurts" or "My hand is aching" should be accepted. Please correct it

[Catparrot]

my hand is in pain (was also accepted).

Using the previous model sentence===>
My hand is aching.
मेरे हाथ में दर्द [ हो रहा ] है ।

"पीटर के पैर में दर्द हो रहा है।"
Translation:Peter's foot is aching.

[Andy520756]

"There is pain in my hand is" has the same meaning in English as "my hand is aching"

[JustusRobi3]

"My hand hurts": more idiomatic.

[Stephanos59785]

This section is inconsistent - it accepts 'my foot is aching' as correct but 'my hand is aching' is marked incorrect. This needs to be sorted out as it becomes counterproductive -

[sweety25523]

Why we are using mere instead of mera

[RonakModi95]

I am not sure if this would help you but anyway I would give it a try.
For objects without a sentence, we can use singular noun as in "mera haath" "mera chehra".
But while forming a sentence, plural is applied as in "mere pair mein dard hai" "tere chehre par khushi hai" "uske kameej par daag hai" etc.