What is the key difference between primary and secondary sewage treatment?

Correct option is (B) 3 Mode - Mean  = k (Median - Mean) Mode = Mean + K.Median - K.Mean Mode = K.Median + (1 - K)Mean We know formula Mode = 3 Median - 2...

A primary key is a field that identifies each record in a database table admitting that the primary key must contain its UNIQUE values.  A secondary key shows the secondary value...

Answer is (C) Man

1. Primary productivity - productivity at producer level  2. Secondary productivity – productivity at consumer level

1. Primary Lymphoid organs: Bone marrow and thymus. 2. Secondary Lymphoid organs: Spleen, lymph nodes, Peyer’s patches (small intestine) and mucosal associated lymphoid tissues (MALT).

(c) Foreign key

1. Distinct  2. Distinct is used with select command while others are column constraints of create table command.

(iii) Assertion is correct statement but reason is wrong statement.

A field which uniquely identifies each record in a table is known as the primary key. e.g. emp id is the primary key of the Employee table.

Correct Answer - B Both (A) to (R) are correct but (R) is not correct explanation of (A).