The University Grants Commission has asked vice chancellors of varsities across the country to "encourage" students to take an online voluntary national-level exam to test their knowledge on ''gau vigyan'' (cow science).

The ''Kamdhenu Gau Vigyan Prachar-Prasar Examination'', for which there is no registration fee, will be held on February 25, and students from primary, secondary and senior-secondary schools as well as colleges can take the test being conducted by the Rashtriya Kamdhenu Aayog (RKA).