The earlier quizzes can be found in the archives of this blog.
Like the earlier ones, the questions relate to a set of station signs. Copyrights for the pictures rest with the original photographers.
A) What do these stations have in common?
If you have got the answer to A), that will help you to get the answers to the subsequent questions:
B1):
B2):
What do the stations in B1) and B2) have in common with those in A) ?
What is the difference between the stations in set B1) and B2) ?
This is somewhat more complicated as some changes to stations in B1) and B2) occurred over 60 years ago.
THE ANSWERS: Darjeeling, Matheran and Sheopur Kalan are (the only) terminuses of branch lines on 2’0″ gauge. Amta and Bilara WERE terminuses of branch lines of 2″0″ gauge and are now BG terminuses. Shivpuri, Bhind and Kishanganj WERE terminuses of branch lines of 2″0″ gauge and are now BG wayside stations.
The first (mostly) correct answers were from Anuj Budhkar and Samit Roychoudhury.
Afterthought: In the picture of Sheopur Kalan you can see what may the last goods wagons on the 2’0″ gauge on IR. There may be some on the Darjeeling line but they are not in regular use either.
The infamous station of Seroni Road (why?) also lies on the line to Sheopur Kalan.
abn397 
What comes to mind: Set 1 are present NG terminii. Set 2 are erstwhile NG terminii, BG now.
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Also remember that these all concern 2-ft gauge. The first group are present terminals, Amta and Bilara are present BG terminals and the other are wayside stations on BG lines after the NG lines were converted and extended.
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A..these are terminal station of narrow gauge 2ft
B.. also terminal station
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See my reply to Samit.
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