Match the following in Column I with Column II.

Thus, the correct matching is:
1 - D, 2 - B, 3 - E, 4 - A.


The bacteria mainly responsible for crown corrosion in a sewer is ___________.
In the context of construction materials, which of the following statements is/are CORRECT?
Pick one or more CORRECT statement(s) from the choices given below, in the context of upstream and downstream cut-offs provided below the concrete apron of weirs/barrages constructed across alluvial rivers.