Which one of the following was NOT a feature of railways in colonial

Which one of the following was NOT a feature of railways in colonial India?

[amp_mcq option1=”The main purpose of the setting up of railways in India was to serve the interest of the empire” option2=”British capital investments were invited with 15% guaranteed interest to be paid if necessary from Indian revenues” option3=”The construction work disturbed ecology” option4=”The construction of the railways was planned in such a way that it connected the internal markets with the ports, but provided no inter-connection between internal market cities” correct=”option2″]