Question

Arrange the given events in chronological order.

\[ \begin{array}{ll} (a) & \text{Launch of Google} \\ (b) & \text{Creation of WWW} \\ (c) & \text{Introduction of the iPhone} \\ (d) & \text{Launch of Facebook} \end{array} \]

• A. \( b \rightarrow a \rightarrow d \rightarrow c \)
• B. \( a \rightarrow c \rightarrow d \rightarrow b \)
• C. \( b \rightarrow d \rightarrow a \rightarrow c \)
• D. \( d \rightarrow a \rightarrow b \rightarrow c \)

Hint:

For chronology questions, write the year beside each event first. Once the years are known, arranging the events becomes quick and error-free.

Answer 1

The Correct Option is A

Concept:

Chronological ordering means arranging events according to the year in which they occurred. To solve such questions, we first identify the year associated with each event and then arrange them from earliest to latest.

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Step 1: World Wide Web (WWW)

The World Wide Web was invented by Tim Berners-Lee at CERN. The proposal for the WWW was made in:

\[ 1989 \]

Therefore, \( (b) = 1989 \)

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Step 2: Google Launch

Google was founded by Larry Page and Sergey Brin and officially launched in:

\[ 1998 \]

Therefore, \( (a) = 1998 \)

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Step 3: Facebook Launch

Facebook was launched by Mark Zuckerberg along with his colleagues in:

\[ 2004 \]

Therefore, \( (d) = 2004 \)

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Step 4: iPhone Introduction

The first iPhone was introduced by Apple Inc. under the leadership of Steve Jobs in:

\[ 2007 \]

Therefore, \( (c) = 2007 \)

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Step 5: Chronological Order \[ \begin{array}{c|c} \text{Event} & \text{Year} \\ \hline (b) & 1989 \\ (a) & 1998 \\ (d) & 2004 \\ (c) & 2007 \end{array} \]

Hence, the correct chronological order is:

\[ \boxed{b \rightarrow a \rightarrow d \rightarrow c} \]

Final Answer: \(\boxed{\text{Option (A)}}\)