Very good one, Lokesh. Thank you for the post.
(I got is wrong, for two reasons... First - I selected the wrong answers, Second - I selected only two. I have selected correct answers before and the no idea what went wrong and.... you know. my stupidity has taken new heights. Oh dear Lord!!!)
The first and the hardest SQL statement I have wrote- "select * from customers" - and I was happy and felt smart.