Directions: The first and the last sentences of a passage are numbered 1 and 6, respectively. The rest of the passage is split into four parts, named A, B, C and D. These four parts are not given in their proper order. Read the sentences and find out which of the following combinations is correct.

1. Biometric identifiers are often categorised as physiological versus behavioural characteristics. A. Since biometric identifiers are unique to individuals, they are more reliable in verifying identity than token and knowledge-based methods. B. More traditional means of identification include token-based systems, such as a driver's license or passport, and knowledge-based systems, such as a password or personal identification number. C. Behavioural characteristics are related to the behaviour of a person, including typing rhythm, gait, and voice. D. Physiological characteristics are related to the shape of the body, which include fingerprint, face recognition, DNA, palm print, hand geometry and iris recognition.
2. However, the collection of biometric identifiers raises privacy concerns about the ultimate use of this information.