Which of the following statement(s) is/ are found to be incorrect? I. The courts established by the British adopted the regional languages and the use of Persian was discontinued in courts. II. The 1850s witnessed the introduction of the three engines of social improvement, that is the railroad, the telegraph and the uniform postal service, which heightened the British illusion of permanence in India. III. The first electric telegraph line was laid in Bengal in 1854 and soon Agra, Bombay and other cities were linked.